It all started with the fact that we are a young childless family bought two “Kama” and became interested in Cycling. With the birth of his daughter had to solve the task: how to travel together? Did a little chair, and set it on the rear trunk. It has served us faithfully for several years But the daughter grew up, and sit in the car seat she was cramped, uncomfortable, the idea of creation of easy folding, durable enough trailer stroller, quickly attachable to the bike.
Associate Professor of the Department “Technology of mechanical engineering” of the Mari state technical University M. L. Popov, having a great experience with Bicycle sport, sent a letter to the editor which described and theoretically substantiated his view on the problem of improving the reliability of the bearing unit of the carriage. Today we publish only constructive and technological proposal of the author. More than 20 years of experience continuous all-weather and all-season operation of my bike model-542 “Sport” issued in 1974, the total mileage of which amounted to about 100 thousand km, as well as analysis diary entries have led to the conclusion that the bottom bracket for reliability is in fourth place after floreina, driven sprocket and drive chain.
“Passenger car” combined with cargo trailer is an extremely convenient vehicle. However, it is not without flaws, which sometimes nullify all its advantages. In particular, significantly reduces the maneuverability of the car and it becomes almost impossible to reverse because the motorists unlike professional drivers a bad maneuver composite vehicles. Low passing “the Zhiguli” or “Zaporozhets” with a massive “tail” at the country and field roads. So, you need a simple and inexpensive malogruzovaja type scooter “Ant”, but with a closed cabin and higher payload. And best of all — based on motorcycle components and assemblies: this will allow you to register it as a cargo motor transport funds. Moreover, motor units are much cheaper car.
The driving force of the engine during the flight of model airplanes, aerovision or aeromobile is the thrust of the propeller. The quality of the workmanship and clarity of the selection of the propulsion depends largely on the General characteristics of the constructed model. It is therefore clear that the design process of the propellers is paid maximum attention. However, the calculation methods of the selection of propellers is highly intricate, time-consuming and not very accurate. Today we recommend a number of well-established screws, already tested on a mass micro-motors internal combustion.
